wtf.rs

extern crate time;


#[derive(Debug, Clone)]
struct Vertex { position: [f32; 2], velocity: [f32; 2] }


fn main() {
    let mut arr = vec![ Vertex { position: [0.0, 0.0], velocity: [0.0, 0.0] }; 200000 ];

    for (_, v) in arr.iter_mut().enumerate() {
        // v.position = [0.0, 0.0];
        v.position = [0.0, 0.0];
        v.velocity = [0.0, 0.0];
    }

    for n in 0..10 {
        let t0 = time_milliseconds();
        
        for i in 0..arr.len() {
            arr[i].position[0] = t0 as f32 % 1.0;
        }

        let t1 = time_milliseconds();
        println!("{:?}: {:?}", n, t1-t0);
    }
}

fn time_milliseconds() -> f64 {
    let timespec = time::get_time();
    let milliseconds: f64 = (timespec.sec as f64 * 1000.0) + (timespec.nsec as f64 / 1000.0 / 1000.0);
    milliseconds
}